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565e4993c6
Any alleged performance benefits gained from the split are purely mythological and do not justify added code complexity.
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/*
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* Copyright (c) 2007 Bobby Bingham
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* audio and video splitter
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*/
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#include <stdio.h>
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#include "avfilter.h"
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#include "audio.h"
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#include "internal.h"
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#include "video.h"
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static int split_init(AVFilterContext *ctx, const char *args)
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{
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int i, nb_outputs = 2;
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if (args) {
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nb_outputs = strtol(args, NULL, 0);
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if (nb_outputs <= 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid number of outputs specified: %d.\n",
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nb_outputs);
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return AVERROR(EINVAL);
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}
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}
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for (i = 0; i < nb_outputs; i++) {
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char name[32];
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AVFilterPad pad = { 0 };
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snprintf(name, sizeof(name), "output%d", i);
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pad.type = ctx->filter->inputs[0].type;
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pad.name = av_strdup(name);
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ff_insert_outpad(ctx, i, &pad);
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}
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return 0;
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}
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static void split_uninit(AVFilterContext *ctx)
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{
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int i;
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for (i = 0; i < ctx->nb_outputs; i++)
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av_freep(&ctx->output_pads[i].name);
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}
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static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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int i, ret = 0;
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for (i = 0; i < ctx->nb_outputs; i++) {
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AVFilterBufferRef *buf_out = avfilter_ref_buffer(frame, ~AV_PERM_WRITE);
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if (!buf_out) {
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ret = AVERROR(ENOMEM);
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break;
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}
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ret = ff_filter_frame(ctx->outputs[i], buf_out);
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if (ret < 0)
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break;
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}
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avfilter_unref_bufferp(&frame);
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return ret;
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}
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static const AVFilterPad avfilter_vf_split_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.get_video_buffer = ff_null_get_video_buffer,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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AVFilter avfilter_vf_split = {
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.name = "split",
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.description = NULL_IF_CONFIG_SMALL("Pass on the input to two outputs."),
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.init = split_init,
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.uninit = split_uninit,
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.inputs = avfilter_vf_split_inputs,
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.outputs = NULL,
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};
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static const AVFilterPad avfilter_af_asplit_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.get_audio_buffer = ff_null_get_audio_buffer,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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AVFilter avfilter_af_asplit = {
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.name = "asplit",
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.description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
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.init = split_init,
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.uninit = split_uninit,
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.inputs = avfilter_af_asplit_inputs,
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.outputs = NULL,
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};
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